== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:41:07 (1781818867)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.2381 s, 9.3 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff9ab283dd0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.307569
Iter 1/10: OSS cache speed: 0.398859
Iter 1/10: ladvise speed: 1.30066
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.20188
Iter 2/10: OSS cache speed: 1.21812
Iter 2/10: ladvise speed: 0.874447
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.18832
Iter 3/10: OSS cache speed: 1.01077
Iter 3/10: ladvise speed: 0.54419
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.721043
Iter 4/10: OSS cache speed: 0.716815
Iter 4/10: ladvise speed: 1.05067
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.05508
Iter 5/10: OSS cache speed: 1.07148
Iter 5/10: ladvise speed: 1.10724
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.943106
Iter 6/10: OSS cache speed: 0.826604
Iter 6/10: ladvise speed: 0.934803
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.718134
Iter 7/10: OSS cache speed: 0.901072
Iter 7/10: ladvise speed: 0.861453
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.594132
Iter 8/10: OSS cache speed: 0.773336
Iter 8/10: ladvise speed: 0.716064
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.670907
Iter 9/10: OSS cache speed: 0.641943
Iter 9/10: ladvise speed: 0.638979
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.711626
Iter 10/10: OSS cache speed: 0.650174
Iter 10/10: ladvise speed: 0.603832
Average uncached read: .81
Average speedup with OSS cached read:  .82 = +1%
Average speedup with ladvise willread:  .86 = +6%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0